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research-article

Skeleton-Section Template Parameterization for Shape Optimization

[+] Author and Article Information
Ping Hu

Professor, School of Automotive Engineering, Dalian University of Technology, Dalian, Liaoning, China 116024
pinghu@dlut.edu.cn

Lei Yang

PhD Student, School of Automotive Engineering, Dalian University of Technology, Dalian, Liaoning, China 116024
lyangdut@mail.dlut.edu.cn

Baojun Li

Associate professor, School of Automotive Engineering, Dalian University of Technology, Dalian, Liaoning, China 116024
bjli@dlut.edu.cn

1Corresponding author.

ASME doi:10.1115/1.4040487 History: Received January 09, 2018; Revised May 31, 2018

Abstract

This study reports a parameterization technique based on a skeleton-section template for shape optimization of beam components. The skeletal curve and the cross-sectional profiles consist of the template, and are used as design variables to generate global shape variants as well as local reinforcements on the surface model. To validate applicability of the proposed template-based parameterization technique to general shape optimization frameworks in automotive engineering, two proof-of-concept numerical studies pertaining to crashworthiness design of an S-shaped frame were implemented. The first case study considered the skeletal curve as design variables, and led to global change of the shape; the second treated the cross-sectional profiles as design parameters and yielded local reinforcements on the shape. Both studies showed the efficiency of the proposed method in generation of high-quality shape variants for optimization and design space exploration. From the numerical results observed were considerable amount of improvements in crashworthiness performance of the structure measured by the peak crushing force and the energy absorption. We conclude that the proposed template-based parameterization technique is suitable for shape optimization tasks.

Copyright (c) 2018 by ASME
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